Datasheet DS18B20 - 2
| Beschreibung | Programmable Resolution1-Wire Digital Thermometer |
| Seiten / Seite | 20 / 2 — Absolute Maximum Ratings. DC Electrical Characteristics. PARAMETER. … |
| Dateiformat / Größe | PDF / 496 Kb |
| Dokumentensprache | Englisch |
Absolute Maximum Ratings. DC Electrical Characteristics. PARAMETER. SYMBOL. CONDITIONS. MIN. TYP. MAX. UNITS. Note 1:. Note 2:. Note 3:
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link to page 3 DS18B20 Programmable Resolution 1-Wire Digital Thermometer
Absolute Maximum Ratings
Voltage Range on Any Pin Relative to Ground ..-0.5V to +6.0V Storage Temperature Range .. -55°C to +125°C Operating Temperature Range ... -55°C to +125°C Solder Temperature ...Refer to the IPC/JEDEC J-STD-020 Specification. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
DC Electrical Characteristics
(-55°C to +125°C; VDD = 3.0V to 5.5V)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage VDD Local power (Note 1) +3.0 +5.5 V Parasite power +3.0 +5.5 Pullup Supply Voltage VPU (Notes 1, 2) V Local power +3.0 VDD -10°C to +85°C ±0.5 Thermometer Error tERR (Note 3) °C -55°C to +125°C ±2 Input Logic-Low VIL (Notes 1, 4, 5) -0.3 +0.8 V Local power +2.2 The lower Input Logic-High VIH (Notes 1,6) of 5.5 or V Parasite power +3.0 VDD + 0.3 Sink Current IL VI/O = 0.4V 4.0 mA Standby Current IDDS (Notes 7, 8) 750 1000 nA Active Current IDD VDD = 5V (Note 9) 1 1.5 mA DQ Input Current IDQ (Note 10) 5 µA Drift (Note 11) ±0.2 °C
Note 1:
All voltages are referenced to ground.
Note 2:
The Pullup Supply Voltage specification assumes that the pullup device is ideal, and therefore the high level of the pullup is equal to VPU. In order to meet the VIH spec of the DS18B20, the actual supply rail for the strong pullup transis- tor must include margin for the voltage drop across the transistor when it is turned on; thus: VPU_ACTUAL = VPU_IDEAL + VTRANSISTOR.
Note 3:
See typical performance curve in Figure 1.
Note 4:
Logic-low voltages are specified at a sink current of 4mA.
Note 5:
To guarantee a presence pulse under low voltage parasite power conditions, VILMAX may have to be reduced to as low as 0.5V.
Note 6:
Logic-high voltages are specified at a source current of 1mA.
Note 7:
Standby current specified up to +70°C. Standby current typically is 3µA at +125°C.
Note 8:
To minimize IDDS, DQ should be within the following ranges: GND ≤ DQ ≤ GND + 0.3V or VDD – 0.3V ≤ DQ ≤ VDD.
Note 9:
Active current refers to supply current during active temperature conversions or EEPROM writes.
Note 10:
DQ line is high (“high-Z” state).
Note 11:
Drift data is based on a 1000-hour stress test at +125°C with VDD = 5.5V. www.maximintegrated.com Maxim Integrated │ 2
Absolute Maximum Ratings
Voltage Range on Any Pin Relative to Ground ..-0.5V to +6.0V Storage Temperature Range .. -55°C to +125°C Operating Temperature Range ... -55°C to +125°C Solder Temperature ...Refer to the IPC/JEDEC J-STD-020 Specification. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
DC Electrical Characteristics
(-55°C to +125°C; VDD = 3.0V to 5.5V)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage VDD Local power (Note 1) +3.0 +5.5 V Parasite power +3.0 +5.5 Pullup Supply Voltage VPU (Notes 1, 2) V Local power +3.0 VDD -10°C to +85°C ±0.5 Thermometer Error tERR (Note 3) °C -55°C to +125°C ±2 Input Logic-Low VIL (Notes 1, 4, 5) -0.3 +0.8 V Local power +2.2 The lower Input Logic-High VIH (Notes 1,6) of 5.5 or V Parasite power +3.0 VDD + 0.3 Sink Current IL VI/O = 0.4V 4.0 mA Standby Current IDDS (Notes 7, 8) 750 1000 nA Active Current IDD VDD = 5V (Note 9) 1 1.5 mA DQ Input Current IDQ (Note 10) 5 µA Drift (Note 11) ±0.2 °C
Note 1:
All voltages are referenced to ground.
Note 2:
The Pullup Supply Voltage specification assumes that the pullup device is ideal, and therefore the high level of the pullup is equal to VPU. In order to meet the VIH spec of the DS18B20, the actual supply rail for the strong pullup transis- tor must include margin for the voltage drop across the transistor when it is turned on; thus: VPU_ACTUAL = VPU_IDEAL + VTRANSISTOR.
Note 3:
See typical performance curve in Figure 1.
Note 4:
Logic-low voltages are specified at a sink current of 4mA.
Note 5:
To guarantee a presence pulse under low voltage parasite power conditions, VILMAX may have to be reduced to as low as 0.5V.
Note 6:
Logic-high voltages are specified at a source current of 1mA.
Note 7:
Standby current specified up to +70°C. Standby current typically is 3µA at +125°C.
Note 8:
To minimize IDDS, DQ should be within the following ranges: GND ≤ DQ ≤ GND + 0.3V or VDD – 0.3V ≤ DQ ≤ VDD.
Note 9:
Active current refers to supply current during active temperature conversions or EEPROM writes.
Note 10:
DQ line is high (“high-Z” state).
Note 11:
Drift data is based on a 1000-hour stress test at +125°C with VDD = 5.5V. www.maximintegrated.com Maxim Integrated │ 2